Patents by Inventor Michael B. Snaddon

Michael B. Snaddon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Raise-boring
    Patent number: 4191267
    Abstract: A drill hole in a rock body is collared by drilling a pilot hole into a tunnel, advancing the pilot drill across the tunnel to drill a hole in the opposite wall of the tunnel aligned with the pilot hole, mounting the borer head on an arbor located across the tunnel in both holes, rotating the borer head to collar the hole, and detaching the borer head from the arbor.
    Type: Grant
    Filed: January 19, 1978
    Date of Patent: March 4, 1980
    Inventor: Michael B. Snaddon